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ATtiny44 Datasheet(PDF) 165 Page - ATMEL Corporation |
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ATtiny44 Datasheet(HTML) 165 Page - ATMEL Corporation |
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165 / 236 page  165 8006H–AVR–10/09 ATtiny24/44/84 next page (See Table 19-11 on page 165). In a chip erased device, no 0xFF in the data file(s) need to be programmed. 6. Any memory location can be verified by using the Read instruction which returns the content at the selected address at serial output MISO. 7. At the end of the programming session, RESET can be set high to commence normal operation. 8. Power-off sequence (if needed): Set RESET to “1”. Turn V CC power off. 19.5.2 Serial Programming Instruction set The instruction set is described in Table 19-12 and Figure 19-2 on page 166. Table 19-11. Minimum Wait Delay Before Writing the Next Flash or EEPROM Location Symbol Minimum Wait Delay tWD_FLASH 4.5 ms tWD_EEPROM 4.0 ms t WD_ERASE 4.0 ms tWD_FUSE 4.5 ms Table 19-12. Serial Programming Instruction Set Instruction/Operation(1) Instruction Format Byte 1 Byte 2 Byte 3 Byte4 Programming Enable $AC $53 $00 $00 Chip Erase (Program Memory/EEPROM) $AC $80 $00 $00 Poll RDY/BSY $F0 $00 $00 data byte out Load Instructions Load Extended Address byte $4D $00 Extended adr $00 Load Program Memory Page, High byte $48 adr MSB adr LSB high data byte in Load Program Memory Page, Low byte $40 adr MSB adr LSB low data byte in Load EEPROM Memory Page (page access) $C1 $00 adr LSB data byte in Read Instructions Read Program Memory, High byte $28 adr MSB adr LSB high data byte out Read Program Memory, Low byte $20 adr MSB adr LSB low data byte out Read EEPROM Memory $A0 $00 adr LSB data byte out Read Lock bits $58 $00 $00 data byte out Read Signature Byte $30 $00 adr LSB data byte out Read Fuse bits $50 $00 $00 data byte out Read Fuse High bits $58 $08 $00 data byte out Read Extended Fuse Bits $50 $08 $00 data byte out Read Calibration Byte $38 $00 $00 data byte out |
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